Increase notification channel limit

Test: atest
Fixes: 159152542
Change-Id: I594970428edcc311d1520eef6d766ad7e88d2be5
diff --git a/services/core/java/com/android/server/notification/PreferencesHelper.java b/services/core/java/com/android/server/notification/PreferencesHelper.java
index afc7557..b047970 100644
--- a/services/core/java/com/android/server/notification/PreferencesHelper.java
+++ b/services/core/java/com/android/server/notification/PreferencesHelper.java
@@ -90,7 +90,7 @@
     private static final String NON_BLOCKABLE_CHANNEL_DELIM = ":";
 
     @VisibleForTesting
-    static final int NOTIFICATION_CHANNEL_COUNT_LIMIT = 5000;
+    static final int NOTIFICATION_CHANNEL_COUNT_LIMIT = 50000;
 
     private static final int NOTIFICATION_PREFERENCES_PULL_LIMIT = 1000;
     private static final int NOTIFICATION_CHANNEL_PULL_LIMIT = 2000;